Home
Class 12
BIOLOGY
Limnaea shell coiling is due to...

Limnaea shell coiling is due to

A

Maternal inheritance

B

Cytoplasmic inheritance

C

Extranuclear inheritance

D

All the above

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Limnaea Shell Coiling**: The question asks about the cause of shell coiling in Limnaea, a type of freshwater snail. It is important to identify the genetic mechanisms that influence this trait. 2. **Analyzing the Options**: The options provided are: - Maternal inheritance - Cytoplasmic inheritance - Extra nuclear inheritance - All of the above 3. **Defining Maternal Inheritance**: Maternal inheritance refers to the genetic transmission of traits from mother to offspring, where the phenotype of the offspring is influenced by the genotype of the mother, as well as environmental factors. 4. **Understanding Cytoplasmic Inheritance**: Cytoplasmic inheritance involves the transmission of genetic material located outside the nucleus, such as mitochondrial DNA or plastid DNA. In Limnaea, this can affect traits like shell coiling. 5. **Identifying Extra Nuclear Inheritance**: Extra nuclear inheritance is similar to cytoplasmic inheritance, as it involves genes that are not located on the chromosomes within the nucleus. This can include genes found in mitochondria or chloroplasts. 6. **Conclusion**: Since Limnaea shell coiling is influenced by maternal factors, which include cytoplasmic and extra nuclear inheritance, the correct answer is that all of these mechanisms contribute to the trait. Therefore, the answer is "All of the above." 7. **Final Answer**: The correct answer is option number 4: All of the above. ---
Promotional Banner

Topper's Solved these Questions

  • CHROMOSOMAL BASIS OF INHERITANCE

    DINESH PUBLICATION ENGLISH|Exercise Check Your Grasp|57 Videos

  • CHORDATA- PROTOCHORDATA

    DINESH PUBLICATION ENGLISH|Exercise CYG|11 Videos

  • COELENTERATA AND CTENOPHORA (OR CNIDARIA AND ACNIDARIA)

    DINESH PUBLICATION ENGLISH|Exercise CYG|10 Videos

Similar Questions

Explore conceptually related problems

Essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding is due to

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that vec B is in the plane of the coil. If due to a current i in the triangle a torque tau acts on it, the side l of the triangle is

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of permanent magnet. Such that vecB is in plane of the coil. If due to a current I in the triangle, a torque tau acts on it, the side l of the triangel is:

A ciruclar coil of 20 turns and radius 10cm is placed in a uniform magnetic field of 0.1T normal to the plane of the coil . If the current in the coil is 5.0A what is the average force on each electron in the coil due to the magnetic field ( The coil is made of copper wire of cross - sectional area 10^(-5)m^(2) and the free electron density in copper is given to be about 10^(29)m^(-3)) .

The shell of Nautilus is

The restoring couple in the moving coil galvanometer is due to

Shell coiling in Linasea is an example

If gravitational field due to uniform thin hemispherical shell at point P is I, then the magnitude of gravitational field at Q is (Mass of hemispherical shell is M, radius is R)

A metallic spherical shell has mas m , radius R and Bulk modulus of elasticity B . The change in radius of the shell due to gravitational pressure

A neutral conducting spherical shell is kept near a charge q as shown .The potentilal at point P due to the induced charge is